Gas and air mixer



G. P. WASHBURN.

GAS AND AIR MIXER.

APPLICATIDN FILED APR.2I1 1919.

1 ,3 14,91 9. Patented Sept. 2,1919.

/9 l0 28 Z9 Z 37 9 fj 3 so "@j 2/ 2 j l7 lz 1/ 25 a 20 //v VENTOR GEORGE RWAsHeL/R/v THE COLUMBIA PLANOGIAPN C0 WASHINGTON, D- C.

UNI TE iA l- N .OFFICE- GEORGE P. WASHBURN, or nos ANGELES, oamromvm, assrsnon 'o'r :1\TE#HALF r0 GEORGE H. WASI-IBURN, or BREMERTON, WASHINGTON.

GAS AND AIR MIXER.

To all whom it may concern: Beit known that I, GEORGE P. WVAsrInunN, a citizen of the United States, residing at LOsAngeles inthe county of Los Angeles and State of- Oalifornia, have invented new and useful Improvements in Gas and Air ,Mixers, of which the following is a specification. 7 a

My invention relates to acetylene burners and consists of the noveli'eatures herein shown, described and claimed I v Specifically my ob'ect'istomake an improved valve mechanism for controlling l iga 1. a

acetylene and controlling an acetylene burner. a p .Figurel is a fragmentary side elevation of t .an acetylene-burner. provided Witha valve mechanism-embodying the principles of "my invention. a y a 1 'Fig. 2 is ahorizontal sectional detail upon an enlarged scale and .uponthe line 2 -2 of Referring to the drawing the acetylene a tank 1 is provided with a p'ermanent .valve construction 2 having an outlet nip le' 3, the tank 1, the valve construction 2 an; the out let nipple 3 being of theu'sual construction.

The acetyleneburner proper 4 is prefer- V ably constructed as shovv'npdescribed and claimed in my companion application for acetylene burners, filed Nov; 14, 1918, fierial Number 262,540, but the burner may be any of the usual constructions.

My present invention relates to the controlling valve mechanism 5 and the details are as follows:

The main body 6 is formed integral With t the union nipple 7, the burner 'feed pipe nipple 8, the air intake nipple 9, the stuffing box nipple 10, and the stuffing box nipple .11. A union 12 connects the nipple 7 to the nipple 3. v A needle valve bore 13 extends from the end of the stuffing box 10 to the needle valve seat 14. A port 15 extends from the needle valve seat 14 and a port 16 extends from the bore 17 and the bore 17 extends from the end of the nipple 7, said ports 15 and 16 intersect at right angles. A needle valve 18 is screw-seated in the bore 13 and a. stuffing box 19 is formed around the needle valve 18 at the end of the nipple 10.

A hose fitting 20 is screwed into the nipple 8 and a burner feed hose 21 connects the hose fitting 20 to the burner 4. A hose fitting 22 is screwed into the nipple 9 and the air sup- ,through the port 16," through the Specification of Letters Patent. i I I 'Paten ted Sept, 2, 1919 Application filed April 21, 1919. Serial No. 291,743. i

positesideof the port 26 from thevalve seat 27, A port. 29,is fQlmed cross-wise of the bore 24 behind the valve seat 27 to connect the bore 24 to the, bore 13. The outer end of the hole made in producing the bore 29 isplugged by the screw 30. V A needle valve 31; 1s screw-seated'throughthe nipple 11 into the bore againstthe valve seat 27 and a stuffin box 32 is fornied upon the nipplell aroun *the valve 31. 1 V l When the needle valve 31' is opened-the air f vill passthrough the hose 23, through thehose fitt1ng22, throughthe port 26,

throughthe valve seat ,through the bore 24,;through the'port "25, through the hose fitting 20 and throughthe hose 21 to the burner 4, and vhen themeedIe valve 18is opened :the' ,acetylene vvillpass from the tank 1 through the valve construction 2, ws fihe pp efirth eu h. t e nippl 7, port 15. pass the valve seat 14, through the port 9, through the bore 24, through the port 25, through the hose fitting 20 and through the hose 21 to the burner 4, and the mixture of the air and acetylene may be accurately regulated by manipulating the needle valves 18 and 31.

The bore 24 is somewhat larger than the stem of the needle valve 31 all the Way from the contacting point of the valve to the screw threads so as to make a clear passage from the port 29 to the port 25 and this passage is of considerable length and provides a chamber in which the air and acetylene Will mix. The pressure of the acetylene 18 against the point of the needle valve 18 and the air pressure is against the point of the needle valve 31, thereby tending to keep the points clean and to make accurate regulation easy.

The specific arrangement of the needle valves makes it possible to get all of the valve mechanism close together and at the same time have the needle valve handles project in opposite'directions and easily accessible for nnanipnlation,

Vaiious changes may .be made without departing as claimed. i I claim:

1. The c mbinati0n-,

outlet nipple of a valve mechanism for con trolling the burner; said valve mechanism comprising a casting -having-a union nip.- ple extending from one-side, a burner feed pipe hippl'e eXteIi-di-Iig from "the opposite side of the "casting from the"-uni0n nipple; an air 1 intake nipple; extending from the same "side -o-fthe castin'g'ias' the.'-burner feed -'p;ipe-.nipple, box --nipple extending. from the same Side of the "casting as theunion and atgright' anglesfte theyunion n pp e a di ewi d iffiflgibbx nip le 9 tencling in the "opposite; direct rfroxn the {seat at "the bottom cf thefibcre; a f pertifezglsecond port extending j fljb'm" the" ion-; p

pleandintersectingtheffir$t POrtjfanhedle v valve in the needle valve here againetjthe valve we; a stufling b ox" mounted npcnthe "nipple "around ithe need le valve a .hosef fitting screwed intc' the: burner feed" pipe nip ple; a hosemcnnecting the ho se fittingto the burner; .a sec en d hcse ffitting' screwed intc the fair-intake: nippl'e' there be ng [a sec'cnd a needle valve borejiormed lffQlI1 "fih6 opposite H v 5 Slde Of the C3l3llig fr0m43hQ second stufling r co i seefthis patent may' lienbtaine dfolffive cents ea'c'h gby ea 7 I: I i y V v waShingtn,vD n ni from the spirit of my invention With an acetylene i lonrnei' and an acetylene tank havingan box nipnle, a'port leading from the burner feed ,pipe nipple t0. the bore, ,a, pont leading lfro mithe air intakenipple'to the second, needle valve 'bore, a second needle valve V i, seatscreW-seated in the bore behind the air intake port, a plug screw-seated into the boreat the opposite side of the. air intake I port froin the valve seat, therebeing a port y 5 I fc'rrnedcrossgwise to connect thesecond bore "behlnd the valve seat to the first needle valve bore behind the first valve seat; sec0nd needle valve screw-seated through the second stufiing box nipple-into the secondneedle' valve bore; and stufling box .fonned aiOufn d the-second needle'valve."

a valve mechanism for controlling H an acetylene burner, a casting,- an acetyle-ne needle valve and an air needle valve eppev Sitely arranged in'the castingytheiebeing f V a'hufnfer feed pipe nipple and anainintake nipple extending (from; -,0ne1-si-de efijthe i cast leading from the point of the airT-lfl eeid'le "through"thefbnnner feed pipenip pl'e; V V k (In testimony whereof I have f is i gned my .v'al-ve tethe burner ee i enipp1e sethat the acetylene passing" the f acetylene *neec'll e i V valve will be, mixed with the: airpassingithe i7 '7 air needle valve andthemixturedischarged 7 dressing the "f'floznmissibner'ol latent s'f I 

